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961c878e0d
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
66 lines
1.7 KiB
Markdown
66 lines
1.7 KiB
Markdown
# hashstructure [](https://godoc.org/github.com/mitchellh/hashstructure)
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hashstructure is a Go library for creating a unique hash value
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for arbitrary values in Go.
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This can be used to key values in a hash (for use in a map, set, etc.)
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that are complex. The most common use case is comparing two values without
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sending data across the network, caching values locally (de-dup), and so on.
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## Features
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* Hash any arbitrary Go value, including complex types.
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* Tag a struct field to ignore it and not affect the hash value.
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* Tag a slice type struct field to treat it as a set where ordering
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doesn't affect the hash code but the field itself is still taken into
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account to create the hash value.
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* Optionally specify a custom hash function to optimize for speed, collision
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avoidance for your data set, etc.
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* Optionally hash the output of `.String()` on structs that implement fmt.Stringer,
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allowing effective hashing of time.Time
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## Installation
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Standard `go get`:
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```
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$ go get github.com/mitchellh/hashstructure
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```
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## Usage & Example
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For usage and examples see the [Godoc](http://godoc.org/github.com/mitchellh/hashstructure).
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A quick code example is shown below:
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```go
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type ComplexStruct struct {
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Name string
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Age uint
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Metadata map[string]interface{}
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}
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v := ComplexStruct{
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Name: "mitchellh",
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Age: 64,
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Metadata: map[string]interface{}{
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"car": true,
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"location": "California",
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"siblings": []string{"Bob", "John"},
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},
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}
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hash, err := hashstructure.Hash(v, nil)
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if err != nil {
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panic(err)
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}
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fmt.Printf("%d", hash)
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// Output:
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// 2307517237273902113
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```
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